Absolutely charming:

In case you’ve been living under a rock (or in a bat cave):

Make-A-Wish foundation grants 5-year-old Miles wish to become Batman. Turning San Francisco into Gotham City, Miles shows the community just how strong of a fighter he is. After being diagnosed at 20 months-old with Leukemia, Miles has beat cancer and is now in remission.

Here are more photos & coverage from the Chronicle.
[Vimeo]